CVE-2026-80888: Linux kernel · drm/vmwgfx: drop dma_buf reference on foreign-fd prime import
Source GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: drop dma_buf reference on foreign-fd prime import ttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's dma_buf->ops do not match the ttm_object_device's ops, but does so without releasing the reference acquired by dma_buf_get(). Any unprivileged renderD client passing a non-vmwgfx prime fd through the DRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per call and indefinitely pins the foreign exporter's GEM resources. Funnel the error path through the existing dma_buf_put() so the reference is always dropped.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80888 (opens in a new tab)
- git.kernel.org/stable/c/1715901e7052cf90fbf04c8303e563a47e021278 (opens in a new tab)
- git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf (opens in a new tab)
- git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057 (opens in a new tab)
- git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293 (opens in a new tab)
- git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f (opens in a new tab)
- git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be (opens in a new tab)
- git.kernel.org/stable/c/c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee (opens in a new tab)
- git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d (opens in a new tab)